Ethernet Service Introduction

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Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.

Ethernet Service Introduction

Page2Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.

Contents

1. Basic Concepts

2. Ethernet Service Classification


Basic Concepts

Port External physical port of Ethernet unit, the common rate

s of external port are 10M, FE, GE;

VC Trunk Virtual Container Trunk, VC Trunk is built by VC. It is the i

nternal port of Ethernet unit.


Basic Concepts of VLAN

VLAN 100VLAN 100 VLAN 200VLAN 200

Purpose of VLAN

division:

Broadcast suppression

Security

Efficient management

VLAN division modes:

Port based

MAC address based

L3 protocol based


Sen

d to

Cro

ss-c

on

nect

un

it

Note: Both of the external and internal ports can process Tag flag

Structure of Ethernet Unit

Report to SCC

FEGE

Collecting alarm and performance

event

NX

VC4

GFP-F

N×VC12/VC3/VC4

FE

Port

VCTRUNK


Tag Attributes Tag flag is used to identify the type of frames. Three types of

Tag attributes are available: Tag aware, Access, and Hybrid. Tag Aware: When the port is set to be Tag aware, the port transmits

the packets with the Tag flag transparently and discards those

without the Tag flag;

Access: When the port is set to be Access, the port attaches a Tag

flag to the packets without Tag flag according to its VLAN ID and

discards those with the Tag flag;

Hybrid: When the port is set to be Hybrid, the port can process

packets regardless of the Tag flag and attach a Tag flag to the

packets without the Tag flag according to its VLAN ID.


Packet

PortTag Untag

Tag aware (In) Transmit transparently Discard

Tag aware (Out) Transmit transparently －

Access (In) DiscardAttach default VLAN

ID

Access (Out) Delete VLAN ID －

Hybrid (In) Transmit transparentlyAttach default VLAN

ID

Hybrid (Out)

If VLAN ID is the same,

delete the Tag flag,

otherwise transmit

transparently

－

Basic Concepts


Contents

1. Basic Concepts




2.1 Overview

2.2 EPL

2.3 EVPL

2.4 EPLAN

Contents


EPL: Ethernet Private EPL: Ethernet Private

LineLineEPLAN: Ethernet Private LANEPLAN: Ethernet Private LAN

EVPL: Ethernet Virtual private EVPL: Ethernet Virtual private

LineLine

EVPLAN: Ethernet Virtual Private EVPLAN: Ethernet Virtual Private

LANLAN

Overview


EPL

DefinitionDefinition

EPL ClassificationEPL Classification

EPL (Ethernet Private Line) ,EPL can provide low

latency and high security point to point

transmission.

Point to Point EPL: Point to point transmission without

sharing;

Port Shared EPL: Share one Port with different VLAN ID;

VCTRUNK Shared EPL: Share one VCTRUNK with different

VLAN ID.


Point to Point EPLA B

2f MS_SP Ring

T2000

NP ChainNE1

NE2

NE3

NE4

NE5

A B

PORT1 PORT2

PORT1 PORT2

VCTRUNK Service A

Service B

Point to Point transmission without sharing


Port Shared EPL

VCTRUNK C & C(1) Service

C & C(2) Service

NE1

NE2

NE3

NE4 NE5

PORT3 PORT4

C(2)C(1)

C (HQ.)

PORT3

NP Chain

T2000

Share one external port with different VLAN ID

2f MS_SP Ring


VCTRUNK Shared EPL

NE1

NE2

NE3

NE4

NE5

DPORT1

PORT2

PORT2PORT1

E

D’ E’

2f MS_SP Ring

NP Chain

Share one VCTRUNK with different VLAN IDT2000

VCTRUNK D & D’ Service E & E’ Service



EVPL( Ethernet Virtual Private Line) multiple

service flows can share VCTRUNK with VLAN ID

and MPLS. It can improve the bandwidth

utilization ratio and save the ports resource of

Ethernet unit.

EVPL


EVPL-- Comparison

Application EPL EVPL

Point to Point Support Support

Port Shared Support Support

VCTRUNK Shared Support Support

MPLS Un-support Support

QinQ Un-support Support

EVPL can provide VCTRUNK sharing with MPLS and QinQ technology


MPLS Basics

MPLS: Multi-protocol Label Switching, standard routing and switching platform; Tunnel/VC: Two labels in MPLS, range of value is 16 ～ (220-1); LSP: Label switching path, different value labels will be given in different nodes, da

ta can be sent forward according these labels; P/PE: P (Provider) internal node of MPLS network, PE (Provider Edge) the edge of M

PLS network.

MPLS network

PE

PE PIP

MPLSLSPP


EVPL (MPLS) EVPL can provide VCTRUNK sharing with different MPLS

labels if the VLAN ID of the service are the same. The

traffic of A and B will share VCTRUNK1 with different

Tunnel and VC values.

LAN Switch

SDH networkNE1 NE2

A 分部 2

A VLAN ID=11

Tunnel

VC

55

25

Tunnel

VC

55

26

VCTRUNK

OptiX OSN3500

Service link

B VLAN ID=11

A VLAN ID=11

B VLAN ID=11


EPLAN


EPLAN (Ethernet Private LAN), it is based on L2

switching. It can provide multi-point to multi-

point low latency and high security

communication.


EPLAN EPLAN (Ethernet Private Local Area Network) all the sub-companies

at different areas can communicate with each other. NE3

implements the L2 switching function.

NE1

NE2

NE3

NE4

NE5PORT1

PORT1

F(1)

F(2)

PORT1

F(3)

VB

PORT1

VCTRUNK1

PORT1

VCTRUNK2VCTRUNK1 VB

VB

PORT1

VCTRUNK1VCTRUNK

F(1) & F(2) ServiceF(3) & F(2) ServiceF(1) & F(3) Service

2f MS_SP Ring

T2000


EPLAN-- MAC Add. Self-learning

Port 1

Port 2

MAC add. Port

MACA 1

MACB 1

MACC 2

MACD 2

L2 Switch

MACD MACA ………

MACA MACD ………

Forwarding based on destination address


EPLAN-- VB/LP

VB: Virtual bridge, logical L2 switch. One Ethernet

unit can configure N*VB, each VB provides M*LP,

the data in different VB is isolated;

LP: Logical Port, the logical port of VB.

VB2VB3

Ethernet UnitPORT

LP1

LP2

LP5

LP6

VCG

VB1

LP4


EPLAN-- RSTP/STP

Root

RSTP/STP: Rapid/Spanning tree protocol. The protocol will temporarily disable the backup links when loop of Ethernet service is occurred in the network.

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Ethernet Service Introduction

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